If the whole body is numb, it may be caused by peripheral blood circulation disorder, which usually occurs in middle-aged and elderly people, and most patients have hyperlipidemia, diabetes and hypertension. Atherosclerosis causes narrowing of the lumen, stiffening of the walls, and poor vascular elasticity. Certain stressful situations may cause impaired blood circulation, and patients may develop peripheral nerve dystrophy, which can manifest as numbness in the extremities. If the patient has unilateral limb numbness and the symptoms are episodic it may be a transient ischemic attack, which usually occurs in middle-aged and elderly people, and common causes include hypertension, diabetes and heart disease, such as atrial fibrillation when it may also be caused. Patients usually present with episodes of limb numbness, which can last for 10-15 minutes, rarely more than an hour, and may also present with unilateral limb motor dysfunction, with normal cranial CT examinations, which can progress to cerebral infarction when occurring frequently, and can be treated with oral aspirin anti-platelet aggregation. If the patient’s symptoms are persistent, it may be caused by lesions in the brain, such as cerebral infarction and cerebral hemorrhage, and cranial tumors may also be caused.